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@article{MM2_1992__76_1_155763, author = {G. Alberti and L. Ambrosio and P. Cannarsa}, title = {On the singularities of convex functions.}, journal = {Manuscripta mathematica}, pages = {421--436}, publisher = {mathdoc}, volume = {76}, number = {1}, year = {1992}, zbl = {0784.49011}, url = {http://geodesic.mathdoc.fr/item/MM2_1992__76_1_155763/} }
G. Alberti; L. Ambrosio; P. Cannarsa. On the singularities of convex functions.. Manuscripta mathematica, Tome 76 (1992) no. 1, pp. 421-436. http://geodesic.mathdoc.fr/item/MM2_1992__76_1_155763/